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ME12058B
Maintenance Section
2. SAFETY
Please read the following safety information before operating the MFM65 system.
2.1 Hazards and Risks
The MFM65 system has potential hazards and risks as follows.
(1) X-ray Hazards
WARNING
The red lamps turn on during X-ray generation. The MFM65 system has no
risk of X-ray exposure during normal operation, because this system has a
shielded radiation enclosure and interlocks to prevent X-ray exposure. (Refer to
“2.3 Interlock List”.)
Pay attention to the warning labels affixed on the enclosure of this system.
The border of the radiation-controlled area is defined at the outside surface of the enclosure. The dose
equivalent limit at the border of the radiation-controlled area is 1.3 mSv / 3 months by Publication 60
issued by the International Commission on Radiological Protection (ICRP). The dose equivalent limit
on the MFM65 is designed to be 2 micro Sv/H, that is based on Rigaku’s design standards. (1.3 mSv /
13 weeks / 6 days / 8 hours = 2 micro Sv/H)
NOTE : In fact, the dose of X-ray radiation outside the enclosure is almost zero.
(2) Electrical Hazards
WARNING
When performing maintenance inside the access panels where electrical hazard
has any potential of causing personal injury or damage to the system, strictly
follow lock-out/tag-out procedure of the instrument before starting the
maintenance work.
(Refer to “2.4 Lock-out/Tag-out”.)
Some electrical charge may remain in the capacitor of the HV transformer, and
electric shock may occur when the HV cable contacts are touched during
cleaning.
Do not disconnect the HV cables of the X-ray generators, and contact Rigaku
Service personnel.
If any fuse blows or if a thermal relay trips frequently in the instrument, its
peripherals, or main power supply, then stop using the equipment. Turn the power
off, and lock and tag the power in the “Off” position from the main Power Box,
Contact trained maintenance personnel or the Rigaku Service center.
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